Candela Steradian per Square Meter to Phot Conversion
Convert between Candela Steradian per Square Meter and Phot quickly and accurately.
How to Convert Candela Steradian per Square Meter to Phot
Conversion Formula
Example
Convert 15 cd·sr/m² to ph:
Unit Information
Learn about the illumination units you're converting between
Candela Steradian per Square Meter
cd·sr/m²
Definition
The Candela Steradian per Square Meter is a unit of illuminance that is dimensionally equivalent to the lux. It represents the luminous intensity per unit solid angle per unit area, providing an alternative way to express illuminance in terms of fundamental photometric quantities.
History/Origin
Derived from the fundamental definitions of luminous intensity and solid angle in the SI system. It provides a direct relationship between illuminance and the basic photometric quantities, emphasizing the geometric aspects of light measurement.
Current Use
Used in theoretical photometry and in calculations where the relationship between luminous intensity, solid angle, and area is emphasized. It provides a fundamental understanding of illuminance in terms of basic photometric principles.
Multiplier
1
Offset
0
Phot
ph
Definition
The Phot is a CGS unit of illuminance equal to 10,000 lux, representing one lumen per square centimeter. It is a larger unit used for measuring very high levels of illumination, particularly in scientific and technical applications where high light intensities are common.
History/Origin
Developed as part of the CGS system of units, where the phot provided a convenient way to express high illumination values. It was widely used in scientific literature and technical applications before the adoption of SI units became standard practice.
Current Use
Primarily found in older scientific literature and specialized technical applications. It provides a practical scale for measuring very bright light sources and is still occasionally referenced in photometric research and historical technical documents.
Multiplier
10000
Offset
0
Candela Steradian per Square Meter to Phot Conversion Table
| Candela Steradian per Square Meter [cd·sr/m²] | Phot [ph] |
|---|---|
| 1 cd·sr/m² | 0.0001 ph |
| 10 cd·sr/m² | 0.001 ph |
| 25 cd·sr/m² | 0.0025 ph |
| 50 cd·sr/m² | 0.005 ph |
| 100 cd·sr/m² | 0.01 ph |
| 0 cd·sr/m² | 0E+0 ph |
| -10 cd·sr/m² | -0.001 ph |
| -40 cd·sr/m² | -0.004 ph |
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